Forced-lubrication system



Aug. 14, 1923;

. 11,464,828 c. A.- PARSONS ET AL FORCED LUBRICATION SYSTEM Filed July 1920 4 Sheets-Sheet 1 [NYE-N70165: HARLES A PA esm/s, v STANLEY 5. 600K.

Aug. 14, 1923. 11,464,828

, c. A. PARSONS ET AL FORCED LUBRIGATION SYSTEM Filed July 7. 1920 4 Sheets-Sheet 2 INVENTOF (H/mes 47 4250 I 5TAJNLEY 000K.

5/M VWMZL FW Aug.14, 1923. 1,464,828

c. A. PARSONS ET AL FORCED LUBRICATION SYSTEM Filed July 7. 1920 4 Sheets-Sheet s INVENTOES: IIAYLES 4731mm;

STANLEY 5 Cam,

Aug; 14, 1923. 134164.828 V v C. A.,PARSONS ET AL FORCED LUBRICA'IION SYSTEM Filed July 7, 1920 4 Sheets-Sheet 4 lNVEN TokS: 7

M was A. 21 Rib/v.3

ularly pointedou't in the "claims.

Patented Aug. 14, 1923.

* un rso' stares PATENT orr ca.

enemies nnenanonrnnsonsfnnn STANLEY SMITH COOK, or NEWCASTLE-UPON- TYNE, ENGLAND; SAID 000K ASSIGNOR T0 SAID PARSONS.

rononnmuenron'rroiv SYSTEM.

Application filed July 7,

tems, er which the following is a specifica tion.

- Thepresent invention relates to forced lubrication systemsand is more particularly applicable to the lubricationi'systems of geared turbines.

.In a geared turbinesystem it is desirablethatthe oil supplied to the high speed turbine and pinion bearings Should have alow visc-osityinorder' to keep down the fric-- tional'loss, while'it is also desirable that the oil supplied to lubricate the interengaging gear teeth should have a high viscosity so as not to be so readily squeezed out by high local pressures at the, tact of the teeth.

tirely separate and-independent lubricating systems, one supplyinglight oil to the high speed bearings and-the other supplyingheavy oil to the gear teeth. There are practical objections to this proposal'as in addi-: tion tov theincrease in the plant, in the supervision required and in the likelihood of abreakdown in the system, thereis a considerable complication involved in separating, in the drain system, the pinion bearing oil from the oil supplied to theteeth.

This system also involves the carrying in the shipof two different qualitiesof lubricating oil for reserve with risk of substitution. v y i The object'o-f the invention is to obviate the .a b'ovementioned disadvantages by means of a lubrication system in whichit is possible to use a single grade of oil for both the above-mentioned purposes.

The invention consists in the'combinati-on. partic:

of elements hereinafter described and In order that the carrying of the invention-into efiect-may be .understoodyrefer ence will'n-ow be made to the accompanying drawing in which: i

Figure 1 illustratesdiagrammatically a points of congravity tanks. 'In orderto meet these conditions it has already been proposed to provide two en 1920. Serial No. 3214,5 18.

lubrication system in which separate pumps and coolers supply lubricant to individual mechanisms.

Fig. 2 shows diagrammatically a system in which a single pump delivers oil through a cooler to a mechanism, a portion of oil from the pump being shunted directly to another mechanism.

Fig. 3 shows diagrammatically a. system in which the entire supply of oil passes through one cooler, from which a portion is supplied direct to a mechanism, the remaining portion passing through an additional cooler.

Fig. i illustratesdiagrammatically the system of Fig. 3 with a supplemental pump placed in circuit to assist insupplying oil to the supplemental cooler. a

Fig. 5 is a view similar to Fig. 2 with gravity tanks placed between the cooler outlets and the mechanism to be lubricated.

Fig. 6 illustrates diagrammatically a lubrication system including duplicate pumps,

coolers of varying capacities and duplicate In carrying the invention into eilect in the manner illustrated by the accompanying drawings, we provide a common drain tank 1 to receive oil fromboththe bearings and the gearing. Duplicate pumps 1'7 and 18 are provided either or both of which may be employed'to deliver oil from the common drain tank 1 to a common delivery pipe 19 through strainers 20, 21. Branches-22, 23 respectively lead from the pipe 19 to coolers 24, 25 supplying oil to the bearings and gearing respectively by pipes 26,, 27. Duplicate gravity tanks 28, 29 are provided and are connected to the coolers, the supply.

pipes 26, and 27 and the drain tank 28 in the manner indicated.

By means of valves 30 placed as shown it is possible to supply oil from the pumps 'to one'ofthe coolers and thenceto the gravity tanks from which oil is delivered to the I bearings and gearlng. The valve 311s a non return valve and is provided so that in the event: of the pressure in the system supplying the gear falling too low the supply will be automatically augmented by oil from the system supplying the bearings. A similar valve, but non-return in the opposite direction, may be fitted in parallel with the valve 81 in order that, in case of failure of'the system supplying the. gearing, oil may v fronithe turbine bearings pass from" that feeding the bearings to the deficient system.

Ve have only referred to two divisions in the oil supply with different degrees of cooling in each, but it is of course possible to have severaldivisions, the bearings having the highest speeds or lightest .loads being supplied with the hottest oil, the bearings having lover speeds or greater loads With cooler oil, and the gear spraycrs With the coolest oil. Again the subdivision may be 'dillerent in character to that indicated above. For instance, the lower speed. bearings maybe supplied Withthe same oil as the gear. Sprayers.

Instead oi a common drain tank, we may use ac rain tank divided by a partition, :and allow the oil from the gearing to drain to the space on one side of this partition, and that to the other. This partition would have overflow openings to prevent excess of oil accumulating on either side of it through intermiiring of the dis charge from any of the bearings with that from thegearing. The effect of such an arrangement would be to establish a permanently coldersystein on one is than on the other, and diminish the amount of cooling to "be done in each circulation.

.lia vingnoiv particularly described and ascertained the nature of our said invention and in What manner the same is to be performed, We declarethat What We claim is:-

, 1. The combination in a lubrication system comprising a plurality of branches using a single grade o'l lubricant, of conduits leading to the parts .to be lubricated which require lubricant of different viscosities,.a common drain tank collecting lubricant from said parts, separate coolers connected to said conduits for differentially cooling said collected lubricant and thereby altering its. viscosity, means for passing lubricant from said drain tank to said coolers and a gravity tank in the various branches each sun l in. oil at a different viscosity, as set forth.

2. The combination in a lubrication systern comprising a plurality of branches usinga single'grade of lubricant, of conduits leading to the parts to .be lubricated which require lubricant ot different viscosities, a common drain tank collecting'lubricant from said parts. separate coolers connected to said conduits "for differentially cooling said collected lubricant and therebyaltering:its viscosity, means for passing lubricant from said drain tank .to' said coolers,.:a Q'ravity tank in the various branches each supply- ..ingxoiliat a different viscosity,.andioverflow leading to the parts to be lubricated which require lubricant of different "viscosit ies, a common. drain tank collecting lubricant from said parts, separate coolers connected to said conduits for differentially cooling" said-collected lubricant and thereby altering its viscosity, means for passing lubricant from said drain tank to said coolers, gravity tanks in the various branches each supplying oil at a different viscosity, overflow pipes from the gravity tanks to the drain tank, and

overflow pipes from one gravity tank to 'another, as set forth.

l. The combination in a lllTb'IlCfllllOIl system ;comprising a plurality of branches using a single grade of lubricant, of conduits leading to the parts to .be lubricated which require lubricant of different viscosities, a common drain taiik collecting lubricantfroin said parts, separate coolers connected to said conduits for differentially cooling said .001- lected lubricantand thereby faltering its viscosity, means for passing lubricant from said drain tank to said cooilers, a gravity tank in the various branches each supplying oil at a dili'erent viscosity, overflow pipes from the gravity tanks to the drain tank,

overflow pipes tromone gravity :tank to another, the said passing :means delivering .Oll

partly to the cooler and partly directly "i0 the machine, asset forth." w

5. The combination in a-lubrication system comprising a [plurality of branchesusing asingle grade ofrlubricanhofconduits leading to the parts to be lubricatedwhich require lubricant of diil'ereut viscosities, a

common .draintankcollecting lubricant from said parts, separate coolers connected to said conduits for differentially cooling said collected lubricant and: thereby altering its. .vis-

cosity, a gravity tank in thewariousbranchesi each supplying .oiligat .a diifierent viscosity, overflow PIPES from the graauty tanks to. the drain tank, overflow pipes ifrom-one gravity tank to another, duplicate pumps drawing oil from :a common drain tank, a .jco'mmon pipe supplying the coolers and gravity tanks, and a series of valves. foricontrollin'g the flow of oil.

6. The combination in :a lubrication sys-.

comm'onidraintank collecting lubricant from said parts, separateacoolers connectedzto said conduits for difl'erentialliy cooling' -said collected lubricant and thereby V alte'ning :i-tsviscosity, a gravitytankinsthe vairious branches each supplying oil sat adifibrentviscosity,

overflow ipes from the gravity :tanks :to the drain tank, overfloiw pipes gfrom one gravity: tank toanother, pumps drawing oil from the common drain tank and delivering it through the coolers- 1n parallel, and aseri'es Lil , said collected lubricant and thereby of valves whereby the oil discharged through one cooler passes to a gravity tank and the oil discharged through the other cooler passes directly to the parts to be lubricated, as set forth. I

7. The combination in a lubrication system comprising a plurality of branches using a single grade of lubricant, of conduits leading to the parts to be lubricated which require lubricant of different viscosities, a common drain tank collecting lubricant from said parts, separate coolers connected to said conduits for differentially cooling said collected lubricant and thereby altering its viscosity, a gravity tank in' the various branches each supplying oil at a different viscosity, overflow pipes from the gravity tanks to the drain tank, overflow pipes from one gravity tank to another, pumps drawing oil from the common drain tank and, delivering it through the coolers in parallel, a series of valve whereby the oil discharged through one cooler passes to gravity tank and the oil discharged through the other cooler passes directly. to the parts to be lubricated, a bye pass pipe between the inlet and outlet of the coolers, and a shut-off valve therein, as set forth.

8. The combination in a lubrication system comprising a plurality of branches using a single grade of lubricant, of conduits leading to the part to be lubricated which require lubricant of different viscosities, a common drain tank collecting lubricant from said parts, separate coolers connected to said conduits for differentiall 1 cooling altering its viscosity, a gravity tank in the various brancheseach supplying oil at a different viscosity, overflow pipes from the gravity tanks to the drain tank, overflow pipes from one gravity tank to another, pumps drawing oil from the common drain tank and delivering it through the coolers in parallel, a seriesof valves whereby the, oil discharged through one cooler passes to a gravity :tank and the oil discharged through the other cooler passes directly to the parts to be lubricated, a byepass pipe between the inlet and outlet of the coolers and a shut-off valve therein, and a bye-pass pipe between the inlet of the gravity tanks and a shut-off valve therein, as set forth.

9. Thecombination in a lubrication sys tem comprising a plurality of branches using a single grade of lubricant, of conduits leading to the parts to be lubricated which require lubricant of different viscosities, a common drain tank collecting lubricant from said parts, separate coolers connected to said conduits for differentially cooling said collected lubricant and thereby altering its viscosity, a gravity tank in the various branches each supplying oil at a different viscosity, overflow pipes from the gravity tanks to the drain tank, overflow pipes from one gravity tank to another, pumps drawing oil from the common drain tank and delivering it through the coolers in parallel, a series of valves whereby the oil discharged through one cooler passes to a gravity tank and the oil discharged through the other cooler passes directly to the parts to be inbricated, a bye-pass pipe between the inlet and outlet of the coolers and a shut-off valve therein, a bye'pass pipe between the inlet and outlet of the gravity tanks and a shutoff valve therein, a drain tank for each condition of oil, and means whereby an excess of oil of one condition can overflow into the tank containing oil of another condition, as set forth,

N 10. The combination in a lubrication system comprising a plurality of branches using a single grade of lubricant, of conduits leading to the parts to be lubricated which require lubricant of different viscosities, a common drain tank collecting lubricant from said parts, separate coolers connected to said conduits for differentially cooling said collected lubricant and thereby altering its viscosity, a gravity tank in the various branches each supplying oil at a different viscosity, overflow pipes from the gravity tank to the drain tank, overflow pipe from one gravity tank to another, pumps drawing oil from the common drain tank and delivering it through the coolers in parallel, a series of valves whereby the oil discharged through one cooler passes to a gravity tank and the oil discharged through the other cooler passes directly to the parts to be lubricated, a bye-pass pipe between the inlet and outlet of the coolers and a shut-off valve therein, and a bye-pass pipe between the inlet-"and outlet of the gravity tanks and a shutoff valve therein, a common drain tank, partitions in the said drain tank providing a separate compartment for each condition ofoil, and means whereby an excess of oil of one condition can overflow into the compartment containing oil of another condition, as set forth.

11. The combination in a lubrication system comprising a plurality of branches using a single grade of lubricant, of conduits leading to the parts to be lubricated which require lubricant ofdifferent viscosities, a common drain tank collecting lubricant from said parts, separate coolers connected to said conduits for differentially cooling said collected lubricant and thereby altering it viscosity, a gravity tank in the various branches each supplying oil at a different viscosity, overflow pipes from the gravity tanks to, the drain tank, overflow pipes from one gravity tank to another, duplicate pumps drawing oil from a common drain tank, a common pipe supplying the coolers and gravity tanks, a eries of valves for controlling the flow oil; slide non-return valve situated in the'pipe delivering theoil from the" cooler and the gravity tanks,- whereby if'th-e pressure in one delivery pipe'i alls too- IOV 'IDll Will automaticallypass into it from theother delivery" pipe, as set'forth;

12. The combination in" at lubrication sly tem comprising a plurality ofb'renches using a single grade of lubricant, of conduits leading to the pxrt-sto be lubri'c'ztted which re quire lubricant of different i "iscosities',-- at common drain-tank collectinglubricant from" said parts, separate coolers connectedtosaid conduitsfor differentially cooling said collooted lubricant and-thereby altering its vis cosity, agrzivityitanlrin the Va ions branches each supplying oil at different viscosity, overflow pipes from the gravity tenksto the drain tanks; overflow pipes from one gravity tank to another, pumps drawing-oil i'ronrthe common drain tan-k and deli vering it through the coolers in parallel, a series of mites whereby the oil discharged through one" cooler passes to aggriivity tanlfiand the oil discharged through the other cooler passes directlyto the partsto be lii'bricat-e'd; and anon-returnvalVesituated iii-the pipe deliv ering'the'oil from the coolerand the gravity tztnks; whereby if the pressure in one deliv mete to another duplicate pumps drawing oilfroin ztcomnion dra tank, a common pipe supplylngthe coolers'an'd g'ravitytaiil'is;

- a series of valves whereby the L oil may be dirooted either through the coolers or throughthegravit y tanks or through both or' ni'giy be delrteredoirectlyt'othe partsto' be lubri-' outed;- a= non-retur1r Valve situated the ne'ctingthe two deli-Very pipes; whereby it 7 the pressure in either deliverypipe tells" more than a; predetermined"sinount belo'tv thepressure in the other delivery pipe; oil will autoiinttioally pe'ssfrom the ipe hav-' ing thehi her pressure to the pipe having thelo'ive'r pressure, as set'forth. V V

l l; The combination in e lubrication systern comprising" a plurality of brancli'es using' a singlegrede of lubricant, of conduits leading'to the parts to-be lubricated whichre quire lubricant of different viscdsities; a common drain tankc'ollecting lubricantjfroin' said parts, separzitecoolers connected tosziid conduits for difiere'ntistlly cooling. saidcollected lubricant and thereby alteringitsvis- 'cosit'y, gravity tank in the" variousbrztn'ohes Qt'Cll supplying oil at a different Viscosity, overflow pipes from the gravity ten'ks'to'the drain tank, overflow pipes from one ravity tank to another; pumps die-Wing oil from the connnon draintank', and delivering it through the coolersin parallel, a. series of valves whereby the-oil discharged"through onecooler passes to a'grivity ten]; and the oil discharged through the other} cooler passes-directly tothepatts to'be lubricated; a non-return yalv'e situated in the pipe de' li erlng the oil from the cooler andthe grzivk it}? tanks whereby it "the 'p're's'sure in one de liv y pipe rtallstoo low oil will lemme: Cally pass into it front the: other delivery pipe, at second pipe delivering 0'11; from"th'e cooler and the ravity tanks, and'an oppo sitely disposednon return valve connecting the two "delivery pipes, whereby it the pressure in" either delivery pipela lls 1116 156 than" a predetermined amount below thepiesshre iii-the other delivery pipe, oil will z 'u'to'mzitt oally pass from the a'i'pdha rin' jj the higher pressure to the pipe having}; the lower pres sure, as seti'orth,

In testimony whereof We have "signed our names to this specification;

CHARLES ALGERN'QN STANLEY SMITH COOK; j 

